/*
 * The MIT License
 * Copyright (c) 2012 kc4.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.kc4.sso.auth.section.provider;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.kc4.sso.auth.SSOContextParameters;
import org.kc4.sso.auth.SSOProviderInitParameters;
import org.kc4.sso.auth.section.InterruptedSectionException;
import org.kc4.sso.auth.section.ModelSection;
import org.kc4.sso.crypto.SSOAsymmetricCipher;
import org.kc4.sso.session.SSOSession;

/**
 * @author yoichi kikuchi
 *
 */
public class AcceptSignoffTokenSection extends ModelSection {

	/**
	 * インスタンスを生成します。
	 *
	 * @param request リクエスト。
	 * @param response レスポンス。
	 */
	public AcceptSignoffTokenSection(HttpServletRequest request, HttpServletResponse response) {

		super(request, response);
	}

	@Override
	public void execute() throws InterruptedSectionException {

		/*
		 * サインオフトークンリクエスト
		 */
		String authorizationToken = this.getRequest().getParameter(SSOContextParameters.getInstance().getNamingOfAuthorizationToken());
		String contextUrl = this.getRequest().getParameter(SSOContextParameters.getInstance().getNamingOfContextUrl());
		String signature = this.getRequest().getParameter(SSOContextParameters.getInstance().getNamingOfSignoffSignature());

		if (authorizationToken != null && !authorizationToken.isEmpty() &&
			contextUrl != null && !contextUrl.isEmpty() &&
			signature != null && !signature.isEmpty()) {

			SSOSession sso = SSOProviderInitParameters
				.getInstance().getSsoSessionStore().get(authorizationToken);

			if (sso != null) {

				String publickey = sso.getActiveClientPublickey(contextUrl);
				SSOAsymmetricCipher cipher = new SSOAsymmetricCipher(publickey);

				this.getLogger().debug(String.format(
					"tring signoff authorization-token \"%s\" context-url \"%s\"",
					authorizationToken, contextUrl));

				// サインオフ成功
				if (cipher.certify(signature, authorizationToken)) {

					sso.inactivateClient(contextUrl);
					if (sso.getActiveClientSize() <= 0) {

						this.getLogger().info(String.format(
							"signoff authorization-token \"%s\" context-url \"%s\"",
							authorizationToken, contextUrl));

						SSOProviderInitParameters.getInstance()
							.getSsoSessionStore().remove(authorizationToken);
					}
				}

				throw new InterruptedSectionException(false);
			}
		}
	}
}
